moragavwsouth

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The Moraga Formation is brown on this geologic map, derived from {link url=”http://pubs.usgs.gov/mf/2000/2342/”}USGS Misc. Field Studies Map 2342{/link}. Localities 1 through 5 are shown in this article.

A pillar of Moraga Formation lava sets off the view across Strawberry Canyon and the Bay from Grizzly Peak Boulevard in northernmost Oakland. All photos by Andrew Alden.

The foreground with the winding road is Sibley Volcanic Regional Preserve (locality 3); behind it is the hidden canyon of Route 24 (locality 2).